db/db/db_pr.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997, 1998
 *  Sleepycat Software.  All rights reserved.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)db_pr.c   10.40 (Sleepycat) 11/22/98";
#endif /* not lint */

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif

#include "db_int.h"
#include "db_page.h"
#include "btree.h"
#include "hash.h"
#include "db_am.h"

static void __db_proff __P((void *));
static void __db_psize __P((DB_MPOOLFILE *));

/*
 * __db_loadme --
 *  Force loading of this file.
 *
 * PUBLIC: void __db_loadme __P((void));
 */
void
__db_loadme()
{
    getpid();
}

static FILE *set_fp;

/*
 * 64K is the maximum page size, so by default we check for offsets
 * larger than that, and, where possible, we refine the test.
 */
#define PSIZE_BOUNDARY  (64 * 1024 + 1)
static size_t set_psize = PSIZE_BOUNDARY;

/*
 * __db_prinit --
 *  Initialize tree printing routines.
 *
 * PUBLIC: FILE *__db_prinit __P((FILE *));
 */
FILE *
__db_prinit(fp)
    FILE *fp;
{
    if (set_fp == NULL)
        set_fp = fp == NULL ? stdout : fp;
    return (set_fp);
}

/*
 * __db_dump --
 *  Dump the tree to a file.
 *
 * PUBLIC: int __db_dump __P((DB *, char *, int));
 */
int
__db_dump(dbp, name, all)
    DB *dbp;
    char *name;
    int all;
{
    FILE *fp, *save_fp;

    COMPQUIET(save_fp, NULL);

    if (set_psize == PSIZE_BOUNDARY)
        __db_psize(dbp->mpf);

    if (name != NULL) {
        if ((fp = fopen(name, "w")) == NULL)
            return (errno);
        save_fp = set_fp;
        set_fp = fp;
    } else
        fp = __db_prinit(NULL);

    (void)__db_prdb(dbp);
    if (dbp->type == DB_HASH)
        (void)__db_prhash(dbp);
    else
        (void)__db_prbtree(dbp);
    fprintf(fp, "%s\n", DB_LINE);
    __db_prtree(dbp->mpf, all);

    if (name != NULL) {
        (void)fclose(fp);
        set_fp = save_fp;
    }
    return (0);
}

/*
 * __db_prdb --
 *  Print out the DB structure information.
 *
 * PUBLIC: int __db_prdb __P((DB *));
 */
int
__db_prdb(dbp)
    DB *dbp;
{
    static const FN fn[] = {
        { DB_AM_DUP,        "duplicates" },
        { DB_AM_INMEM,      "in-memory" },
        { DB_AM_LOCKING,    "locking" },
        { DB_AM_LOGGING,    "logging" },
        { DB_AM_MLOCAL,     "local mpool" },
        { DB_AM_PGDEF,      "default page size" },
        { DB_AM_RDONLY,     "read-only" },
        { DB_AM_SWAP,       "needswap" },
        { DB_AM_THREAD,     "thread" },
        { DB_BT_RECNUM,     "btree:recnum" },
        { DB_DBM_ERROR,     "dbm/ndbm error" },
        { DB_RE_DELIMITER,  "recno:delimiter" },
        { DB_RE_FIXEDLEN,   "recno:fixed-length" },
        { DB_RE_PAD,        "recno:pad" },
        { DB_RE_RENUMBER,   "recno:renumber" },
        { DB_RE_SNAPSHOT,   "recno:snapshot" },
        { 0 },
    };
    FILE *fp;
    const char *t;

    fp = __db_prinit(NULL);

    switch (dbp->type) {
    case DB_BTREE:
        t = "btree";
        break;
    case DB_HASH:
        t = "hash";
        break;
    case DB_RECNO:
        t = "recno";
        break;
    default:
        t = "UNKNOWN";
        break;
    }

    fprintf(fp, "%s ", t);
    __db_prflags(dbp->flags, fn, fp);
    fprintf(fp, "\n");

    return (0);
}

/*
 * __db_prbtree --
 *  Print out the btree internal information.
 *
 * PUBLIC: int __db_prbtree __P((DB *));
 */
int
__db_prbtree(dbp)
    DB *dbp;
{
    static const FN mfn[] = {
        { BTM_DUP,  "duplicates" },
        { BTM_RECNO,    "recno" },
        { BTM_RECNUM,   "btree:recnum" },
        { BTM_FIXEDLEN, "recno:fixed-length" },
        { BTM_RENUMBER, "recno:renumber" },
        { 0 },
    };
    DBC *dbc;
    BTMETA *mp;
    BTREE *t;
    FILE *fp;
    PAGE *h;
    RECNO *rp;
    db_pgno_t i;
    int cnt, ret;
    const char *sep;

    t = dbp->internal;
    fp = __db_prinit(NULL);
    if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0)
        return (ret);

    (void)fprintf(fp, "%s\nOn-page metadata:\n", DB_LINE);

    i = PGNO_METADATA;
    if ((ret = memp_fget(dbp->mpf, &i, 0, (PAGE **)&mp)) != 0) {
        (void)dbc->c_close(dbc);
        return (ret);
    }

    fprintf(fp, "lsn.file: %lu lsn.offset: %lu\n",
        (u_long)LSN(mp).file, (u_long)LSN(mp).offset);
    (void)fprintf(fp, "magic %#lx\n", (u_long)mp->magic);
    (void)fprintf(fp, "version %#lx\n", (u_long)mp->version);
    (void)fprintf(fp, "pagesize %lu\n", (u_long)mp->pagesize);
    (void)fprintf(fp, "maxkey: %lu minkey: %lu\n",
        (u_long)mp->maxkey, (u_long)mp->minkey);

    (void)fprintf(fp, "free list: %lu", (u_long)mp->free);
    for (i = mp->free, cnt = 0, sep = ", "; i != PGNO_INVALID;) {
        if ((ret = memp_fget(dbp->mpf, &i, 0, &h)) != 0)
            return (ret);
        i = h->next_pgno;
        (void)memp_fput(dbp->mpf, h, 0);
        (void)fprintf(fp, "%s%lu", sep, (u_long)i);
        if (++cnt % 10 == 0) {
            (void)fprintf(fp, "\n");
            cnt = 0;
            sep = "";
        } else
            sep = ", ";
    }
    (void)fprintf(fp, "\n");

    (void)fprintf(fp, "flags %#lx", (u_long)mp->flags);
    __db_prflags(mp->flags, mfn, fp);
    (void)fprintf(fp, "\n");
    (void)memp_fput(dbp->mpf, mp, 0);

    (void)fprintf(fp, "%s\nDB_INFO:\n", DB_LINE);
    (void)fprintf(fp, "bt_maxkey: %lu bt_minkey: %lu\n",
        (u_long)t->bt_maxkey, (u_long)t->bt_minkey);
    (void)fprintf(fp, "bt_compare: %#lx bt_prefix: %#lx\n",
        (u_long)t->bt_compare, (u_long)t->bt_prefix);
    if ((rp = t->recno) != NULL) {
        (void)fprintf(fp,
            "re_delim: %#lx re_pad: %#lx re_len: %lu re_source: %s\n",
            (u_long)rp->re_delim, (u_long)rp->re_pad,
            (u_long)rp->re_len,
            rp->re_source == NULL ? "" : rp->re_source);
        (void)fprintf(fp,
            "cmap: %#lx smap: %#lx emap: %#lx msize: %lu\n",
            (u_long)rp->re_cmap, (u_long)rp->re_smap,
            (u_long)rp->re_emap, (u_long)rp->re_msize);
    }
    (void)fprintf(fp, "ovflsize: %lu\n", (u_long)t->bt_ovflsize);
    (void)fflush(fp);
    return (dbc->c_close(dbc));
}

/*
 * __db_prhash --
 *  Print out the hash internal information.
 *
 * PUBLIC: int __db_prhash __P((DB *));
 */
int
__db_prhash(dbp)
    DB *dbp;
{
    FILE *fp;
    DBC *dbc;
    HASH_CURSOR *hcp;
    int i, put_page, ret;
    db_pgno_t pgno;

    fp = __db_prinit(NULL);
    if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0)
        return (ret);
    hcp = (HASH_CURSOR *)dbc->internal;

    /*
     * In this case,  hcp->hdr will never be null, if we decide
     * to pass dbc's to this routine instead, then it could be.
     */
    if (hcp->hdr == NULL) {
        pgno = PGNO_METADATA;
        if ((ret = memp_fget(dbp->mpf, &pgno, 0, &hcp->hdr)) != 0)
            return (ret);
        put_page = 1;
    } else
        put_page = 0;

    fprintf(fp, "\tmagic      %#lx\n", (u_long)hcp->hdr->magic);
    fprintf(fp, "\tversion    %lu\n", (u_long)hcp->hdr->version);
    fprintf(fp, "\tpagesize   %lu\n", (u_long)hcp->hdr->pagesize);
    fprintf(fp, "\tovfl_point %lu\n", (u_long)hcp->hdr->ovfl_point);
    fprintf(fp, "\tlast_freed %lu\n", (u_long)hcp->hdr->last_freed);
    fprintf(fp, "\tmax_bucket %lu\n", (u_long)hcp->hdr->max_bucket);
    fprintf(fp, "\thigh_mask  %#lx\n", (u_long)hcp->hdr->high_mask);
    fprintf(fp, "\tlow_mask   %#lx\n", (u_long)hcp->hdr->low_mask);
    fprintf(fp, "\tffactor    %lu\n", (u_long)hcp->hdr->ffactor);
    fprintf(fp, "\tnelem      %lu\n", (u_long)hcp->hdr->nelem);
    fprintf(fp, "\th_charkey  %#lx\n", (u_long)hcp->hdr->h_charkey);

    for (i = 0; i < NCACHED; i++)
        fprintf(fp, "%lu ", (u_long)hcp->hdr->spares[i]);
    fprintf(fp, "\n");

    (void)fflush(fp);
    if (put_page) {
        (void)memp_fput(dbp->mpf, (PAGE *)hcp->hdr, 0);
        hcp->hdr = NULL;
    }
    return (dbc->c_close(dbc));
}

/*
 * __db_prtree --
 *  Print out the entire tree.
 *
 * PUBLIC: int __db_prtree __P((DB_MPOOLFILE *, int));
 */
int
__db_prtree(mpf, all)
    DB_MPOOLFILE *mpf;
    int all;
{
    PAGE *h;
    db_pgno_t i;

    if (set_psize == PSIZE_BOUNDARY)
        __db_psize(mpf);

    for (i = PGNO_ROOT;; ++i) {
        if (memp_fget(mpf, &i, 0, &h) != 0)
            break;
        (void)__db_prpage(h, all);
        (void)memp_fput(mpf, h, 0);
    }
    (void)fflush(__db_prinit(NULL));
    return (0);
}

/*
 * __db_prnpage
 *  -- Print out a specific page.
 *
 * PUBLIC: int __db_prnpage __P((DB_MPOOLFILE *, db_pgno_t));
 */
int
__db_prnpage(mpf, pgno)
    DB_MPOOLFILE *mpf;
    db_pgno_t pgno;
{
    PAGE *h;
    int ret;

    if (set_psize == PSIZE_BOUNDARY)
        __db_psize(mpf);

    if ((ret = memp_fget(mpf, &pgno, 0, &h)) != 0)
        return (ret);

    ret = __db_prpage(h, 1);
    (void)fflush(__db_prinit(NULL));

    (void)memp_fput(mpf, h, 0);
    return (ret);
}

/*
 * __db_prpage
 *  -- Print out a page.
 *
 * PUBLIC: int __db_prpage __P((PAGE *, int));
 */
int
__db_prpage(h, all)
    PAGE *h;
    int all;
{
    BINTERNAL *bi;
    BKEYDATA *bk;
    HOFFPAGE a_hkd;
    FILE *fp;
    RINTERNAL *ri;
    db_indx_t dlen, len, i;
    db_pgno_t pgno;
    int deleted, ret;
    const char *s;
    u_int8_t *ep, *hk, *p;
    void *sp;

    fp = __db_prinit(NULL);

    switch (TYPE(h)) {
    case P_DUPLICATE:
        s = "duplicate";
        break;
    case P_HASH:
        s = "hash";
        break;
    case P_IBTREE:
        s = "btree internal";
        break;
    case P_INVALID:
        s = "invalid";
        break;
    case P_IRECNO:
        s = "recno internal";
        break;
    case P_LBTREE:
        s = "btree leaf";
        break;
    case P_LRECNO:
        s = "recno leaf";
        break;
    case P_OVERFLOW:
        s = "overflow";
        break;
    default:
        fprintf(fp, "ILLEGAL PAGE TYPE: page: %lu type: %lu\n",
            (u_long)h->pgno, (u_long)TYPE(h));
            return (1);
    }
    fprintf(fp, "page %4lu: (%s)\n", (u_long)h->pgno, s);
    fprintf(fp, "    lsn.file: %lu lsn.offset: %lu",
        (u_long)LSN(h).file, (u_long)LSN(h).offset);
    if (TYPE(h) == P_IBTREE || TYPE(h) == P_IRECNO ||
        (TYPE(h) == P_LRECNO && h->pgno == PGNO_ROOT))
        fprintf(fp, " total records: %4lu", (u_long)RE_NREC(h));
    fprintf(fp, "\n");
    if (TYPE(h) != P_IBTREE && TYPE(h) != P_IRECNO)
        fprintf(fp, "    prev: %4lu next: %4lu",
            (u_long)PREV_PGNO(h), (u_long)NEXT_PGNO(h));
    if (TYPE(h) == P_IBTREE || TYPE(h) == P_LBTREE)
        fprintf(fp, " level: %2lu", (u_long)h->level);
    if (TYPE(h) == P_OVERFLOW) {
        fprintf(fp, " ref cnt: %4lu ", (u_long)OV_REF(h));
        __db_pr((u_int8_t *)h + P_OVERHEAD, OV_LEN(h));
        return (0);
    }
    fprintf(fp, " entries: %4lu", (u_long)NUM_ENT(h));
    fprintf(fp, " offset: %4lu\n", (u_long)HOFFSET(h));

    if (!all || TYPE(h) == P_INVALID)
        return (0);

    ret = 0;
    for (i = 0; i < NUM_ENT(h); i++) {
        if (P_ENTRY(h, i) - (u_int8_t *)h < P_OVERHEAD ||
            (size_t)(P_ENTRY(h, i) - (u_int8_t *)h) >= set_psize) {
            fprintf(fp,
                "ILLEGAL PAGE OFFSET: indx: %lu of %lu\n",
                (u_long)i, (u_long)h->inp[i]);
            ret = EINVAL;
            continue;
        }
        deleted = 0;
        switch (TYPE(h)) {
        case P_HASH:
        case P_IBTREE:
        case P_IRECNO:
            sp = P_ENTRY(h, i);
            break;
        case P_LBTREE:
            sp = P_ENTRY(h, i);
            deleted = i % 2 == 0 &&
                B_DISSET(GET_BKEYDATA(h, i + O_INDX)->type);
            break;
        case P_LRECNO:
        case P_DUPLICATE:
            sp = P_ENTRY(h, i);
            deleted = B_DISSET(GET_BKEYDATA(h, i)->type);
            break;
        default:
            fprintf(fp,
                "ILLEGAL PAGE ITEM: %lu\n", (u_long)TYPE(h));
            ret = EINVAL;
            continue;
        }
        fprintf(fp, "   %s[%03lu] %4lu ",
            deleted ? "D" : " ", (u_long)i, (u_long)h->inp[i]);
        switch (TYPE(h)) {
        case P_HASH:
            hk = sp;
            switch (HPAGE_PTYPE(hk)) {
            case H_OFFDUP:
                memcpy(&pgno,
                    HOFFDUP_PGNO(hk), sizeof(db_pgno_t));
                fprintf(fp,
                    "%4lu [offpage dups]\n", (u_long)pgno);
                break;
            case H_DUPLICATE:
                /*
                 * If this is the first item on a page, then
                 * we cannot figure out how long it is, so
                 * we only print the first one in the duplicate
                 * set.
                 */
                if (i != 0)
                    len = LEN_HKEYDATA(h, 0, i);
                else
                    len = 1;

                fprintf(fp, "Duplicates:\n");
                for (p = HKEYDATA_DATA(hk),
                    ep = p + len; p < ep;) {
                    memcpy(&dlen, p, sizeof(db_indx_t));
                    p += sizeof(db_indx_t);
                    fprintf(fp, "\t\t");
                    __db_pr(p, dlen);
                    p += sizeof(db_indx_t) + dlen;
                }
                break;
            case H_KEYDATA:
                if (i != 0)
                    __db_pr(HKEYDATA_DATA(hk),
                        LEN_HKEYDATA(h, 0, i));
                else
                    fprintf(fp, "%s\n", HKEYDATA_DATA(hk));
                break;
            case H_OFFPAGE:
                memcpy(&a_hkd, hk, HOFFPAGE_SIZE);
                fprintf(fp,
                    "overflow: total len: %4lu page: %4lu\n",
                    (u_long)a_hkd.tlen, (u_long)a_hkd.pgno);
                break;
            }
            break;
        case P_IBTREE:
            bi = sp;
            fprintf(fp, "count: %4lu pgno: %4lu ",
                (u_long)bi->nrecs, (u_long)bi->pgno);
            switch (B_TYPE(bi->type)) {
            case B_KEYDATA:
                __db_pr(bi->data, bi->len);
                break;
            case B_DUPLICATE:
            case B_OVERFLOW:
                __db_proff(bi->data);
                break;
            default:
                fprintf(fp, "ILLEGAL BINTERNAL TYPE: %lu\n",
                    (u_long)B_TYPE(bi->type));
                ret = EINVAL;
                break;
            }
            break;
        case P_IRECNO:
            ri = sp;
            fprintf(fp, "entries %4lu pgno %4lu\n",
                (u_long)ri->nrecs, (u_long)ri->pgno);
            break;
        case P_LBTREE:
        case P_LRECNO:
        case P_DUPLICATE:
            bk = sp;
            switch (B_TYPE(bk->type)) {
            case B_KEYDATA:
                __db_pr(bk->data, bk->len);
                break;
            case B_DUPLICATE:
            case B_OVERFLOW:
                __db_proff(bk);
                break;
            default:
                fprintf(fp,
                "ILLEGAL DUPLICATE/LBTREE/LRECNO TYPE: %lu\n",
                    (u_long)B_TYPE(bk->type));
                ret = EINVAL;
                break;
            }
            break;
        }
    }
    (void)fflush(fp);
    return (ret);
}

/*
 * __db_isbad
 *  -- Decide if a page is corrupted.
 *
 * PUBLIC: int __db_isbad __P((PAGE *, int));
 */
int
__db_isbad(h, die)
    PAGE *h;
    int die;
{
    BINTERNAL *bi;
    BKEYDATA *bk;
    FILE *fp;
    db_indx_t i;
    u_int type;

    fp = __db_prinit(NULL);

    switch (TYPE(h)) {
    case P_DUPLICATE:
    case P_HASH:
    case P_IBTREE:
    case P_INVALID:
    case P_IRECNO:
    case P_LBTREE:
    case P_LRECNO:
    case P_OVERFLOW:
        break;
    default:
        fprintf(fp, "ILLEGAL PAGE TYPE: page: %lu type: %lu\n",
            (u_long)h->pgno, (u_long)TYPE(h));
        goto bad;
    }

    for (i = 0; i < NUM_ENT(h); i++) {
        if (P_ENTRY(h, i) - (u_int8_t *)h < P_OVERHEAD ||
            (size_t)(P_ENTRY(h, i) - (u_int8_t *)h) >= set_psize) {
            fprintf(fp,
                "ILLEGAL PAGE OFFSET: indx: %lu of %lu\n",
                (u_long)i, (u_long)h->inp[i]);
            goto bad;
        }
        switch (TYPE(h)) {
        case P_HASH:
            type = HPAGE_TYPE(h, i);
            if (type != H_OFFDUP &&
                type != H_DUPLICATE &&
                type != H_KEYDATA &&
                type != H_OFFPAGE) {
                fprintf(fp, "ILLEGAL HASH TYPE: %lu\n",
                    (u_long)type);
                goto bad;
            }
            break;
        case P_IBTREE:
            bi = GET_BINTERNAL(h, i);
            if (B_TYPE(bi->type) != B_KEYDATA &&
                B_TYPE(bi->type) != B_DUPLICATE &&
                B_TYPE(bi->type) != B_OVERFLOW) {
                fprintf(fp, "ILLEGAL BINTERNAL TYPE: %lu\n",
                    (u_long)B_TYPE(bi->type));
                goto bad;
            }
            break;
        case P_IRECNO:
        case P_LBTREE:
        case P_LRECNO:
            break;
        case P_DUPLICATE:
            bk = GET_BKEYDATA(h, i);
            if (B_TYPE(bk->type) != B_KEYDATA &&
                B_TYPE(bk->type) != B_DUPLICATE &&
                B_TYPE(bk->type) != B_OVERFLOW) {
                fprintf(fp,
                "ILLEGAL DUPLICATE/LBTREE/LRECNO TYPE: %lu\n",
                    (u_long)B_TYPE(bk->type));
                goto bad;
            }
            break;
        default:
            fprintf(fp,
                "ILLEGAL PAGE ITEM: %lu\n", (u_long)TYPE(h));
            goto bad;
        }
    }
    return (0);

bad:    if (die) {
        abort();
        /* NOTREACHED */
    }
    return (1);
}

/*
 * __db_pr --
 *  Print out a data element.
 *
 * PUBLIC: void __db_pr __P((u_int8_t *, u_int32_t));
 */
void
__db_pr(p, len)
    u_int8_t *p;
    u_int32_t len;
{
    FILE *fp;
    u_int lastch;
    int i;

    fp = __db_prinit(NULL);

    fprintf(fp, "len: %3lu", (u_long)len);
    lastch = '.';
    if (len != 0) {
        fprintf(fp, " data: ");
        for (i = len <= 20 ? len : 20; i > 0; --i, ++p) {
            lastch = *p;
            if (isprint(*p) || *p == '\n')
                fprintf(fp, "%c", *p);
            else
                fprintf(fp, "0x%.2x", (u_int)*p);
        }
        if (len > 20) {
            fprintf(fp, "...");
            lastch = '.';
        }
    }
    if (lastch != '\n')
        fprintf(fp, "\n");
}

/*
 * __db_prdbt --
 *  Print out a DBT data element.
 *
 * PUBLIC: int __db_prdbt __P((DBT *, int, FILE *));
 */
int
__db_prdbt(dbtp, checkprint, fp)
    DBT *dbtp;
    int checkprint;
    FILE *fp;
{
    static const char hex[] = "0123456789abcdef";
    u_int8_t *p;
    u_int32_t len;

    /*
     * !!!
     * This routine is the routine that dumps out items in the format
     * used by db_dump(1) and db_load(1).  This means that the format
     * cannot change.
     */
    if (checkprint) {
        for (len = dbtp->size, p = dbtp->data; len--; ++p)
            if (isprint(*p)) {
                if (*p == '\\' && fprintf(fp, "\\") != 1)
                    return (EIO);
                if (fprintf(fp, "%c", *p) != 1)
                    return (EIO);
            } else
                if (fprintf(fp, "\\%c%c",
                    hex[(u_int8_t)(*p & 0xf0) >> 4],
                    hex[*p & 0x0f]) != 3)
                    return (EIO);
    } else
        for (len = dbtp->size, p = dbtp->data; len--; ++p)
            if (fprintf(fp, "%c%c",
                hex[(u_int8_t)(*p & 0xf0) >> 4],
                hex[*p & 0x0f]) != 2)
                return (EIO);

    return (fprintf(fp, "\n") == 1 ? 0 : EIO);
}

/*
 * __db_proff --
 *  Print out an off-page element.
 */
static void
__db_proff(vp)
    void *vp;
{
    FILE *fp;
    BOVERFLOW *bo;

    fp = __db_prinit(NULL);

    bo = vp;
    switch (B_TYPE(bo->type)) {
    case B_OVERFLOW:
        fprintf(fp, "overflow: total len: %4lu page: %4lu\n",
            (u_long)bo->tlen, (u_long)bo->pgno);
        break;
    case B_DUPLICATE:
        fprintf(fp, "duplicate: page: %4lu\n", (u_long)bo->pgno);
        break;
    }
}

/*
 * __db_prflags --
 *  Print out flags values.
 *
 * PUBLIC: void __db_prflags __P((u_int32_t, const FN *, FILE *));
 */
void
__db_prflags(flags, fn, fp)
    u_int32_t flags;
    FN const *fn;
    FILE *fp;
{
    const FN *fnp;
    int found;
    const char *sep;

    sep = " (";
    for (found = 0, fnp = fn; fnp->mask != 0; ++fnp)
        if (LF_ISSET(fnp->mask)) {
            fprintf(fp, "%s%s", sep, fnp->name);
            sep = ", ";
            found = 1;
        }
    if (found)
        fprintf(fp, ")");
}

/*
 * __db_psize --
 *  Get the page size.
 */
static void
__db_psize(mpf)
    DB_MPOOLFILE *mpf;
{
    BTMETA *mp;
    db_pgno_t pgno;

    set_psize = PSIZE_BOUNDARY - 1;

    pgno = PGNO_METADATA;
    if (memp_fget(mpf, &pgno, 0, &mp) != 0)
        return;

    switch (mp->magic) {
    case DB_BTREEMAGIC:
    case DB_HASHMAGIC:
        set_psize = mp->pagesize;
        break;
    }
    (void)memp_fput(mpf, mp, 0);
}